| hydrogen
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nature : the first cycle is an element that is the lightest element. Atomic number one. Stable isotopes : 1,2,3 (little). Amu 1.00794. Molecular 2.0159. Colorless and odorless gas can not rule. Density 0.08987 (0 ° C). Valence ± 1. Dissolved in liquid minimal, but some metal but it can absorb hydrogen (such as palladium to absorb 1,000 times its own volume of hydrogen). Hydrogen adsorption steel will be caused "hydrogen embrittlement," which process equipment damage. The high temperature less lively, unless a suitable catalyst. The high temperature will become highly active. Can combustion, and with many direct metal and non-metallic compound. In nature, the free state of hydrogen little in the atmosphere was less than 1 ppm. The main chemical form in the presence of water and organic matter. Hydrogen is the universe's most abundant element. Planet hydrogen fusion is the energy source of radiation. Difficult liquefied hydrogen [-240 ° Ccritical temperature, critical pressure of 1.3 MPa (13.0 atmospheres)]. Liquid hydrogen colorless and transparent. The relative density of 0.70 (-252 ° C). Boiling point -252.8 ° C For access for low-temperature and high-energy fuel. Let liquid hydrogen in the rapid evaporation under vacuum, into the whitest part of the solid hydrogen. The relative density of 0.0807 (-262 ° C). -259.14 ° C melting point. The three hydrogen isotopes for protium (1H), protium (2H) and tritium (3H). Hydrogen is a natural by 99.98% and 0.02% protium protium component, tritium in nature are rare. As important industrial raw materials, such as ammonia. The high temperature hydrogen reduction of metal oxides from metals to the system compared to other methods, the nature of the products easier to control, while the purity of metal high. Widely used tungsten, molybdenum, cobalt, iron and other metal powder and germanium, silicon production. Industrial production method is electrolysis, hydrocarbon cracking, hydrocarbon vapors into law, refinery gas extraction law. With the traditional method than hydrogen, water electrolysis hydrogen production costs are relatively high, is only applicable to the needs of high pure occasions, such as medicine, semiconductor industry. Electrolyzer generally use the box-type frame or bipolar type, the key issue is to reduce the two-cell potential and resistance, reduced energy consumption. Common nickel anode and the cathode porous nickel alloys, the use of asbestos divide, the electrolyte is 20% to 25% KOH or NaOH, temperature 70 ~ 80 ° C, cell voltage of about 2 to 2.5 volts (water theoretical decomposition voltage of about 1.2 volts). Water purity higher, and in order to avoid impurities (especially Cl-) accumulation, caused corrosion. It also uses solid electrolyte fuel cell technology for the electrolyzer, electrolyte hydrogen ion exchange membrane to avoid the corrosive caustic lye and gas leakage, availability of 99.996% pure hydrogen.
Notice:Each item can have many explanations from different angels. If you want grasp the item comprehensively,please see below "more details data". |
| Structure: |
| Please see below "More Detailed Data" |
| More Detailed Data: |
1) Hydrogen;hydrogen gas
2) hydrogen
3) Hydrogen
4) hydrogen
5) hydrogen H
6) parahydrogen
7) orthohydrogen
8) tetrahydrogen;tungstosilicic acid hydrate;silicotungstic acid;Tungstate(4-),[μ12-[orthosilicato(4-)-O,O,O,O',O',O',O'',O'',O'',O''',O''',O''']]tetracosa-μ-oxododecaoxododeca-,tetrahydrogen
9) hydrogen-3;triterium;tritium;tritium(hydrogen-3);tritium lightening powder
10) heavy hydrogen;deuterium;2H;D;21H
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| Notice |
Some description was translated by software and the data is only as a reference. |
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